2K Games has Tweeted a teaser to something called Advent.
— 2K (@2K) May 25, 2015
The site starts off by stating
The ADVENT Administration strives to create a world free from hunger, pain, sickness, and war. We believe in a global community of happy and comfortable citizens.
However, stay on the site long enough and that text soon gets a less hopeful addition
The ADVENT is lying to you.
Other parts of the site also update as you scroll such as the newsletter sign up which changes to the warning “SIGN UP AT YOUR PERIL.”
We can probably expect to see more of Advent in the lead up to and including the E3 event which starts on the 16th June.